Implement the texture uploading of ASTC compression for WebGL

ui/gl/gl_image_memory.cc

Index: ui/gl/gl_image_memory.cc
diff --git a/ui/gl/gl_image_memory.cc b/ui/gl/gl_image_memory.cc
index 5ccb9d160f8c7d124a4e58e631b1ff9811778243..b7f90db6d66aa10fefbba3f6e0663ab3bac1c05f 100644
--- a/ui/gl/gl_image_memory.cc
+++ b/ui/gl/gl_image_memory.cc
@@ -35,6 +35,7 @@ bool ValidInternalFormat(unsigned internalformat) {
 
 bool ValidFormat(GpuMemoryBuffer::Format format) {
   switch (format) {
+    case GpuMemoryBuffer::ASTC:
     case GpuMemoryBuffer::ATC:
     case GpuMemoryBuffer::ATCIA:
     case GpuMemoryBuffer::DXT1:
@@ -56,6 +57,7 @@ bool ValidFormat(GpuMemoryBuffer::Format format) {
 
 bool IsCompressedFormat(GpuMemoryBuffer::Format format) {
   switch (format) {
+    case GpuMemoryBuffer::ASTC:
     case GpuMemoryBuffer::ATC:
     case GpuMemoryBuffer::ATCIA:
     case GpuMemoryBuffer::DXT1:
@@ -77,6 +79,8 @@ bool IsCompressedFormat(GpuMemoryBuffer::Format format) {
 
 GLenum TextureFormat(GpuMemoryBuffer::Format format) {
   switch (format) {
+    case GpuMemoryBuffer::ASTC:
+      return GL_COMPRESSED_RGBA_ASTC_4x4_KHR;
     case GpuMemoryBuffer::ATC:
       return GL_ATC_RGB_AMD;
     case GpuMemoryBuffer::ATCIA:
@@ -116,6 +120,7 @@ GLenum DataType(GpuMemoryBuffer::Format format) {
     case GpuMemoryBuffer::BGRA_8888:
     case GpuMemoryBuffer::R_8:
       return GL_UNSIGNED_BYTE;
+    case GpuMemoryBuffer::ASTC:
     case GpuMemoryBuffer::ATC:
     case GpuMemoryBuffer::ATCIA:
     case GpuMemoryBuffer::DXT1:
@@ -177,6 +182,7 @@ bool GLImageMemory::StrideInBytes(size_t width,
     case GpuMemoryBuffer::DXT5:
       *stride_in_bytes = width;
       return true;
+    case GpuMemoryBuffer::ASTC:
     case GpuMemoryBuffer::ATC:
     case GpuMemoryBuffer::DXT1:
     case GpuMemoryBuffer::ETC1: